Tool for compressing valve-springs



H. S. JILLSON.

TOOL FOR COMPRESSING VALVE SPRINGS. APPLICATION FILED MAY 22, 1919.RENEWED DEC. 15.1920.

1,38%9583 Patented July 19, 1921 'nvewtoz ffa/"Zaiz 5 Mm 5m WWW UNITEDTOOL FOR COLIPRESSING VALVE-SPRINGS.

Specification of Letters Patent.

Patented July 19, 1921.

Application filed May 22, 1919, Serial No. 298,956. Renewed December 15,1920. Serial No. 430,997.

T 0 all whom it may concern:

Be it known that I, HARLAN S. JILLsoN, a citizen of the United States,residing at Turners Falls, in the county of Franklin and State ofMassachusetts, have invented certain new and useful Improvements inTools for Compressing Valve-Springs, of which the following is aspecification.

My invention relates to improvements in tools for compressing valvesprings so that the valves may be removed or ground.

An important object of the invention is to provide a device of the abovementioned character, which is simple in construction, easy to operate,strong and durable.

Other objects and advantages of the invention will be apparent duringthe course of the following description.

In the accompanying drawings forming a part of this specification, andin which like numerals are employed to designate like parts throughoutthe same:

Figure 1 is a side elevation of a device embodying my invention;

Fig. 2 is a plan view of the same;

Fig. 3 is a longitudinal section, taken on line 3-3 of Fig. 1;

Fig. is a transverse section, taken on line 4 4= of Fig. 2; and

Fig. 5 is a perspective view of sleeve members.

In the drawings, wherein for the purpose of illustration is shown apreferred embodiment of my invention, the numeral 5 designates acylinder of an internal combustion engine having an inlet or outlet port6 adapted to be opened and closed by a valve 7 carried by a stem 8. Thisstem projects downwardly and is surrounded by a compressible coil spring9, engaging a washer 10, held in place by a cotter pin 9', or the like,which may be removed, when the washer is moved upwardly sufficiently.

My device embodies a pair of permanently parallel rods 11' and 12, whichare preferably cylindrical. These rods carry at their forward endsextensions 13, which are forked, as shown at 14. One forked portion 14is adapted to contact with a shoulder 15, while the other forked portionis adapted to engage beneath the washer 10, as shown.

The rods 11 and 12 are provided at or near their forward ends with pairsof trunnions 16 and 17, pivoted within apertures formed in the ends ofpairs of links 18.

These links cross each other and are pivotally connected at theircenters, as shown at 19. The links 18 form a lazy-tongs structure. Therear ends of the inner links 18 are apertured for receiving trunnionsections 20, which are semi-circular, and formed upon sleeve sections21. The rear ends of the outer links 18 are apertured for pivotallyreceiving trunnions 22, formed upon the lower rod 12.

The upper rod 11 has its rear portion screw threaded, as shown at 24,and this screw threaded portion receives thereon an internal screwthreaded operating sleeve 25, provided at its rear end with a handle 26for turning the same. The operating sleeve 25, as more clearly shown inFig. 3, is provided near its forward end with an annular groove 27,slidably receiving the coupling sleeve section 21, this coupling sleevehaving a swiveled engagement with the operating sleeve.

It is seen that when the tool is arranged as shown in Fig. 1, uponrotating the operating sleeve 25, the same will be advanced forwardlyupon the upper rod 11, and this movement will expand the lazy-tongsstructure, causing the jaws 13 to spread while remaining parallel. Thewasher 10 is moved upwardly compressing the spring 9 so that the cotterpin or the like may be removed. When this is done, the valve 7 may beremoved or it may be freely rotated or ground upon its seat.

Particular attention is called to the fact that the device is not at allrestricted to the use as illustrated in Fig. 1, wherein the aws 13 arearranged exterior-1y of or beneath the spring to be compressed. Thedevice may be employed for compressing the spring, by arranging thespring between the jaws 13, as these jaws may be moved either inwardlyor outwardly by turning the operating sleeve 25. As the jaws 13 remainparallel, the spring may not be removed in grinding or repairing thevalve. The jaws 13 are adapted to be open for a considerable extentthereby providing free access between the same, and the device as apowerful leverage.

It is to be understood that the form of my invention herewith shown anddescribed is to be taken as the preferred example of the same, and thatvarious changes in the shape, size and arrangement of parts may beresorted to Without departing from the spirit of the invention or thescope of the subjoined claims.

7 Having thus described my invention, I claim:

1. A tool of the character described, comprising a pair of rods, one rodhaving a screw-threaded portion, a rotatable operating sleeve havingscrew-threaded engagement with the screw-threaded portion and providedwith an annular recess, a collar rotatable within the recess, a linkpivotally connected with one rod and with the collar, a second linkpivotally connected with the rods and crossing the first-named link, andmeans to pivotally connect the links.

'2. A tool of the character described, comprising a pair of rods, onerod having a screw-threaded portion, a rotatable operating sleeve havingscrew-threaded engage 20 ments, a link pivotally connected with one 25rod and provided with an aperture near its opposite end to receive thepivot elements and thereby retain the parts of the collar assembled, asecond link pivotally connected with, the rods andcrossing thefirst-named link, and means to pivotally connect the links.

In testimony whereof I afliX my signature in presence of two witnesses.

' HARLAN S. J ILLSON.

Witnesses THERESA L. AUBRY, HENRY E, BEAUMIER.

